A283326 Number of compatible Parke-Taylor factors for the graph obtained by combining one bubble with a regular n-gon.

1, 6, 32, 200, 1518, 13160, 126032, 1325682

Offset

2,2

Links

Table of n, a(n) for n=2..9.

Freddy Cachazo, Humberto Gomez, Computation of Contour Integrals on M_{0,n}, arXiv preprint, 2015. Also JHEP, 2016; doi:10.1007/JHEP04(2016)108. See Table 1.

Crossrefs

Sequence in context: A020058 A146557 A020013 * A221540 A331878 A121120

Adjacent sequences: A283323 A283324 A283325 * A283327 A283328 A283329

Keyword

nonn,more

Author

N. J. A. Sloane, Mar 17 2017

Status

approved